Dimon, who grabbed headlines after he likened bitcoin's value to a bubble and called it a fraud, added: "I’m not going to talk about bitcoin anymore.”

His attitude is a stark contrast to that of Goldman Sachs CEO Lloyd Blankfein, who commented on Oct. 3 that he would neither bash bitcoin, nor endorse it.

“Still thinking about #Bitcoin,” Blankfein said on Twitter. “No conclusion — not endorsing/rejecting. Know that folks were skeptical when paper money displaced gold.”

Goldman Sachs (NYSE: GS) is also considering a new trading operation devoted to cryptocurrencies, according to The Wall Street Journal. The move would make it the first big Wall Street firm to deal directly in the controversial market.

JPMorgan also attempted to build its own private blockchain, Quorum, which would be open to approved participants and used to move money between foreign branches. This secrecy is the reason why the technology is so appealing.

Bitcoin value soared above $5,231 on Thursday. The previous all-time high was $5,013.91 on Sept. 2.

The uptick stems from speculation that China could reverse the ban of cryptocurrency exchanges is driving sentiment